feat(search): add fuzzy search and "did you mean?" suggestions

perf(dl,core): fix mutex contention in parallel downloads and database

feat(cli): add `soar repo` subcommand for repository management

feat(repo): add repository management operations (add, update, remove)

feat(packages): add arch_map for custom arch name mapping

chore: release (#159)

chore(manifest): remove deprecated authors field

docs(readme): update readme

fix(health): use absolute path for health check

fix(config): respect repository enabled flag

refactor(pubkey): use inline key string instead of fetching from URL

fix(clippy): apply clippy suggestions

fix(provides): remove provides filter and add bin_symlink_names helper

fix(sync): properly respect sync_interval for repository updates

feat(provides): add @ prefix to symlink packages directly to bin